Coghlan's Water Purification Tablets

Tablets are intended for emergency disinfection of drinking water. When
used as directed, they make most water bacteria-suitable for drinking.
To be used only when water is suspected or known to be substandard. For
short term or limited emergency use only. Not to be used on a continuous
basis. Treats up to 25 quarts. Recommended use: 2 tablets per 1 quart
of water. Keep some with your emergency preparedness supplies.